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Intelligent measurement and control system for ultra-short radius well position
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EMWD electromagnetic wave measuring system suitable for diamond core drilling
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Small-size rotary valve pulser of resistant scouring
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A kind of short radius directional tool
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A kind of method and apparatus suitable for measuring formation fluid downhole pressure
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A kind of lower seat key MWD underground multifunctional pipe nipple
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A kind of dynamic orientation gamma survey system based on fluxgate
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A kind of rotary steering bottom hole assembly
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A kind of brill survey deviational survey data QC check methods
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A kind of nearly drill bit measuring device that the scope of application is big
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A kind of wireless drift indicator uses foldable centralizer
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A kind of rotary magnetic range-measurement system and its distance measuring method
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Through non magnetic drill collar and MWD wireless communication systems and method in oil drilling
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ZFD type leak stopping system
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A kind of measuring method of SYMMETRIC ELECTROMAGNETIC ripple resistivity
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One kind can salvage suspension rotary rotary valve pulser system
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A kind of magnetic coupling connector
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High temperature high precision water-level gauge for geothermal well monitoring system
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Power saving circuit of exploring tube
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Orientation sensor circuit without temperature calibration
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